package com.sayimo.maker.commons.utils;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.io.UnsupportedEncodingException;
import java.security.Key;
import java.util.Date;

import javax.crypto.Cipher;
import javax.crypto.SecretKeyFactory;
import javax.crypto.spec.DESedeKeySpec;
import javax.crypto.spec.IvParameterSpec;
              
    /**  
      * 3DES加密工具类  
      */   
    public class DES3 {    
         // 密钥    
         private final static String secretKey = "mdes.sayimo.com/maker?#@" ; //my.oschina.net/penngo?#@    
         // 向量    
         private final static String iv = "54982569" ;    
         // 加解密统一使用的编码方式    
         private final static String encoding = "utf-8" ;    
              
         /**  
          * 3DES加密  
          *   
          * @param plainText 普通文本  
          * @return  
          * @throws Exception   
          */   
         public static String encode(String plainText) throws Exception {    
             Key deskey = null ;    
             DESedeKeySpec spec = new DESedeKeySpec(secretKey.getBytes());    
             SecretKeyFactory keyfactory = SecretKeyFactory.getInstance( "desede" );    
             deskey = keyfactory.generateSecret(spec);    
              
             Cipher cipher = Cipher.getInstance( "desede/CBC/PKCS5Padding" );    
             IvParameterSpec ips = new IvParameterSpec(iv.getBytes());    
             cipher.init(Cipher.ENCRYPT_MODE, deskey, ips);    
             byte [] encryptData = cipher.doFinal(plainText.getBytes(encoding));    
             return Base64.encode(encryptData);    
         }    
              
         /**  
          * 3DES解密  
          *   
          * @param encryptText 加密文本  
          * @return  
          * @throws Exception  
          */   
         public static String decode(String encryptText) throws Exception {    
             Key deskey = null ;    
             DESedeKeySpec spec = new DESedeKeySpec(secretKey.getBytes());     
             SecretKeyFactory keyfactory = SecretKeyFactory.getInstance( "desede" );    
             deskey = keyfactory.generateSecret(spec);    
             Cipher cipher = Cipher.getInstance( "desede/CBC/PKCS5Padding" );    
             IvParameterSpec ips = new IvParameterSpec(iv.getBytes());    
             cipher.init(Cipher.DECRYPT_MODE, deskey, ips);    
              
             byte [] decryptData = cipher.doFinal(Base64.decode(encryptText));    
              
             return new String(decryptData, encoding);    
         }    
           
        public static String padding(String str) {  
            byte[] oldByteArray;  
            try {  
                oldByteArray = str.getBytes("UTF8");  
                int numberToPad = 8 - oldByteArray.length % 8;  
                byte[] newByteArray = new byte[oldByteArray.length + numberToPad];  
                System.arraycopy(oldByteArray, 0, newByteArray, 0,  
                        oldByteArray.length);  
                for (int i = oldByteArray.length; i < newByteArray.length; ++i) {  
                    newByteArray[i] = 0;  
                }  
                return new String(newByteArray, "UTF8");  
            } catch (UnsupportedEncodingException e) {  
                System.out.println("Crypter.padding UnsupportedEncodingException");  
            }  
            return null;  
        }  
          
        /**  
          * Base64编码工具类  
          *  
          */   
        public static class Base64 {    
             private static final char [] legalChars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-_" .toCharArray();    
                  
             public static String encode( byte [] data) {    
                 int start = 0 ;    
                 int len = data.length;    
                 StringBuffer buf = new StringBuffer(data.length * 3 / 2 );    
                  
                 int end = len - 3 ;    
                 int i = start;    
                 int n = 0 ;    
                  
                 while (i <= end) {    
                     int d = (((( int ) data[i]) & 0x0ff ) << 16 ) | (((( int ) data[i + 1 ]) & 0x0ff ) << 8 ) | ((( int ) data[i + 2 ]) & 0x0ff );    
                  
                     buf.append(legalChars[(d >> 18 ) & 63 ]);    
                     buf.append(legalChars[(d >> 12 ) & 63 ]);    
                     buf.append(legalChars[(d >> 6 ) & 63 ]);    
                     buf.append(legalChars[d & 63 ]);    
                  
                     i += 3 ;    
                  
                     if (n++ >= 14 ) {    
                         n = 0 ;    
                         buf.append( " " );    
                     }    
                 }    
                  
                 if (i == start + len - 2 ) {    
                     int d = (((( int ) data[i]) & 0x0ff ) << 16 ) | (((( int ) data[i + 1 ]) & 255 ) << 8 );    
                  
                     buf.append(legalChars[(d >> 18 ) & 63 ]);    
                     buf.append(legalChars[(d >> 12 ) & 63 ]);    
                     buf.append(legalChars[(d >> 6 ) & 63 ]);    
                     buf.append( "=" );    
                 } else if (i == start + len - 1 ) {    
                     int d = ((( int ) data[i]) & 0x0ff ) << 16 ;    
                  
                     buf.append(legalChars[(d >> 18 ) & 63 ]);    
                     buf.append(legalChars[(d >> 12 ) & 63 ]);    
                     buf.append( "==" );    
                 }    
                  
                 return buf.toString();    
             }    
                  
             private static int decode( char c) {    
                 if (c >= 'A' && c <= 'Z' )    
                     return (( int ) c) - 65 ;    
                 else if (c >= 'a' && c <= 'z' )    
                     return (( int ) c) - 97 + 26 ;    
                 else if (c >= '0' && c <= '9' )    
                     return (( int ) c) - 48 + 26 + 26 ;    
                 else   
                     switch (c) {    
                     case '-' :    
                         return 62 ;    
                     case '_' :    
                         return 63 ;    
                     case '=' :    
                         return 0 ;    
                     default :    
                         throw new RuntimeException( "unexpected code: " + c);    
                     }    
             }    
                  
             /**  
              * Decodes the given Base64 encoded String to a new byte array. The byte array holding the decoded data is returned.  
              */   
                  
             public static byte [] decode(String s) {    
                  
                 ByteArrayOutputStream bos = new ByteArrayOutputStream();    
                 try {    
                     decode(s, bos);    
                 } catch (IOException e) {    
                     throw new RuntimeException();    
                 }    
                 byte [] decodedBytes = bos.toByteArray();    
                 try {    
                     bos.close();    
                     bos = null ;    
                 } catch (IOException ex) {    
                     System.err.println( "Error while decoding BASE64: " + ex.toString());    
                 }    
                 return decodedBytes;    
             }    
                  
             private static void decode(String s, OutputStream os) throws IOException {    
                 int i = 0 ;    
                  
                 int len = s.length();    
                  
                 while ( true ) {    
                     while (i < len && s.charAt(i) <= ' ' )    
                         i++;    
                  
                     if (i == len)    
                         break ;    
                  
                     int tri = (decode(s.charAt(i)) << 18 ) + (decode(s.charAt(i + 1 )) << 12 ) + (decode(s.charAt(i + 2 )) << 6 ) + (decode(s.charAt(i + 3 )));    
                  
                     os.write((tri >> 16 ) & 255 );    
                     if (s.charAt(i + 2 ) == '=' )    
                         break ;    
                     os.write((tri >> 8 ) & 255 );    
                     if (s.charAt(i + 3 ) == '=' )    
                         break ;    
                     os.write(tri & 255 );    
                  
                     i += 4 ;    
                 }    
             }    
        }   
           
         public static void main(String[] args) throws Exception{  
        	 Long time = new Date().getTime();
 			System.out.println(time);
 			String encode=DES3.encode(time+"|4521|asdfqws|"+time);
 			System.out.println(encode);
 			System.out.println(DES3.decode(encode));
         }  
    }  